mp-22903: RbI (cubic, Fm-3m, 225)

material

RbI

ID:

mp-22903

DOI:

10.17188/1199069

Electronic Structure
Phonon Dispersion
X-Ray Diffraction
X-Ray Absorption
Substrates
Elasticity
Dielectric Properties
Equations of State
Similar Structures
Calculation Summary
Provenance/Citation

Tags: Rubidium iodide

Material Details

Final Magnetic Moment 0.000 μ_B Calculated total magnetic moment for the unit cell within the magnetic ordering provided (see below). Typically accurate to the second digit.
Magnetic Ordering NM
Formation Energy / Atom -1.506 eV Calculated formation energy from the elements normalized to per atom in the unit cell.
Energy Above Hull / Atom 0.000 eV The energy of decomposition of this material into the set of most stable materials at this chemical composition, in eV/atom. Stability is tested against all potential chemical combinations that result in the material's composition. For example, a Co2O3 structure would be tested for decomposition against other Co2O3 structures, against Co and O2 mixtures, and against CoO and O2 mixtures.
Density 3.36 g/cm³ The calculated bulk crystalline density, typically underestimated due calculated cell volumes overestimated on average by 3% (+/- 6%)
Decomposes To Stable
Band Gap 3.954 eV In general, band gaps computed with common exchange-correlation functionals such as the LDA and GGA are severely underestimated. Typically the disagreement is reported to be ~50% in the literature. Some internal testing by the Materials Project supports these statements; typically, we find that band gaps are underestimated by ~40%. We additionally find that several known insulators are predicted to be metallic.

Space Group

Hermann Mauguin Fm3m [225]
Hall -F 4 2 3
Point Group m3m
Crystal System cubic

Electronic Structure

Topological data for ICSD ID 22168 from Topological Materials Database

Topological Classification

trivial*

Subclassification

LCEBR^†

* trivial insulator or metal

^† Linear Combination of Elementary Band Representations

Band Structure and Density of States

Warning! Semi-local DFT tends to severely underestimate bandgaps. Please see the wiki for more info.

Vibrational Properties

Reference for phonon calculations and visualization: Visualize with phononwebsite

Phonon dispersion

Density of States

Warning! These calculations were performed using a PBEsol exchange correlation functional in the framework of DFPT using the Abinit code. Please see the wiki for more info.

X-Ray Diffraction

Select radiation source:

Calculated powder diffraction pattern; note that peak spacings may be affected due to inaccuracies in calculated cell volume, which is typically overestimated on average by 3% (+/- 6%)

X-Ray Absorption Spectra

FEFF XANES

Select an element to display a spectrum averaged over all sites of that element in the structure.

Apply Gaussian smoothing:

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3 eV

FWHM: 0 eV

Download spectra for every symmetrically equivalent absorption site in the structure.

Download FEFF Input parameters.

Warning: These results are intended to be semi-quantitative in that corrections, such as edge shifts and Debye-Waller damping, have not been included.

Substrates

Reference for minimal coincident interface area (MCIA) and elastic energy:
substrate orientation:

substrate material	substrate orientation	film orientation	elastic energy [meV]	MCIA^† [Å²]
ZnO (mp-2133)	<0 0 1>	<1 1 1>	0.002	291.3
Ag (mp-124)	<1 0 0>	<1 0 0>	0.002	224.3
TiO₂ (mp-2657)	<0 0 1>	<1 0 0>	0.002	280.3
SrTiO₃ (mp-4651)	<0 0 1>	<1 0 0>	0.005	280.3
ZnO (mp-2133)	<1 0 0>	<1 0 0>	0.006	280.3
YAlO₃ (mp-3792)	<1 1 0>	<1 0 0>	0.008	56.1
Bi₂Se₃ (mp-541837)	<0 0 1>	<1 1 1>	0.011	291.3
SiO₂ (mp-6930)	<1 0 1>	<1 1 0>	0.012	317.2
Cu (mp-30)	<1 1 0>	<1 1 0>	0.014	317.2
Mg (mp-153)	<1 0 0>	<1 0 0>	0.014	168.2
TiO₂ (mp-2657)	<1 0 0>	<1 1 0>	0.015	317.2
Au (mp-81)	<1 0 0>	<1 0 0>	0.015	224.3
ZrO₂ (mp-2858)	<1 0 -1>	<1 1 1>	0.017	291.3
SiO₂ (mp-6930)	<1 1 1>	<1 1 0>	0.018	158.6
Cu (mp-30)	<1 1 1>	<1 1 1>	0.020	291.3
Al (mp-134)	<1 0 0>	<1 0 0>	0.024	280.3
LiF (mp-1138)	<1 0 0>	<1 0 0>	0.025	280.3
GaN (mp-804)	<1 0 0>	<1 0 0>	0.026	168.2
C (mp-66)	<1 1 1>	<1 1 1>	0.027	291.3
Ni (mp-23)	<1 1 0>	<1 1 0>	0.028	158.6
Ni (mp-23)	<1 0 0>	<1 0 0>	0.031	112.1
CaCO₃ (mp-3953)	<0 0 1>	<1 1 1>	0.032	291.3
InP (mp-20351)	<1 0 0>	<1 0 0>	0.032	280.3
Ge₃(BiO₃)₄ (mp-23560)	<1 1 0>	<1 1 0>	0.035	158.6
YAlO₃ (mp-3792)	<0 1 1>	<1 1 1>	0.037	97.1
KP(HO₂)₂ (mp-23959)	<0 0 1>	<1 0 0>	0.039	224.3
Ge₃(BiO₃)₄ (mp-23560)	<1 0 0>	<1 0 0>	0.040	112.1
KTaO₃ (mp-3614)	<1 0 0>	<1 0 0>	0.044	280.3
CdWO₄ (mp-19387)	<1 0 1>	<1 0 0>	0.052	224.3
Ni (mp-23)	<1 1 1>	<1 1 0>	0.054	317.2
YAlO₃ (mp-3792)	<0 1 0>	<1 1 0>	0.057	79.3
ZrO₂ (mp-2858)	<0 0 1>	<1 0 0>	0.057	56.1
LaF₃ (mp-905)	<1 1 0>	<1 0 0>	0.059	280.3
GaN (mp-804)	<1 1 0>	<1 1 0>	0.060	237.9
LiAlO₂ (mp-3427)	<1 1 0>	<1 1 0>	0.062	237.9
MgF₂ (mp-1249)	<0 0 1>	<1 0 0>	0.063	112.1
LiGaO₂ (mp-5854)	<1 1 0>	<1 1 0>	0.065	237.9
LiTaO₃ (mp-3666)	<1 0 0>	<1 1 1>	0.070	291.3
InSb (mp-20012)	<1 0 0>	<1 0 0>	0.074	224.3
YAlO₃ (mp-3792)	<1 0 0>	<1 1 0>	0.076	79.3
ZnO (mp-2133)	<1 1 0>	<1 1 0>	0.078	237.9
ZrO₂ (mp-2858)	<1 0 0>	<1 1 1>	0.079	291.3
LiTaO₃ (mp-3666)	<0 0 1>	<1 0 0>	0.082	280.3
CdTe (mp-406)	<1 0 0>	<1 0 0>	0.084	224.3
MgO (mp-1265)	<1 1 1>	<1 0 0>	0.087	280.3
KP(HO₂)₂ (mp-23959)	<1 0 0>	<1 0 0>	0.088	112.1
AlN (mp-661)	<0 0 1>	<1 0 0>	0.089	168.2
GaTe (mp-542812)	<1 0 0>	<1 0 0>	0.089	224.3
NdGaO₃ (mp-3196)	<0 0 1>	<1 0 0>	0.090	280.3
InAs (mp-20305)	<1 1 0>	<1 1 0>	0.090	158.6

Up to 50 entries displayed.

^†minimal coincident interface area.

Elasticity

Reference for tensor and properties:

Visualize with ELATE

Stiffness Tensor Cij (GPa)
21	4	4	0	0	0
4	21	4	0	0	0
4	4	21	0	0	0
0	0	0	3	0	0
0	0	0	0	3	0
0	0	0	0	0	3

Compliance Tensor Sij (10^-12Pa^-1)
50.6	-8	-8	0	0	0
-8	50.6	-8	0	0	0
-8	-8	50.6	0	0	0
0	0	0	334.1	0	0
0	0	0	0	334.1	0
0	0	0	0	0	334.1

Shear Modulus G_V 5 GPa	Bulk Modulus K_V 10 GPa
Shear Modulus G_R 4 GPa	Bulk Modulus K_R 10 GPa
Shear Modulus G_VRH 5 GPa	Bulk Modulus K_VRH 10 GPa
Elastic Anisotropy 1.44	Poisson's Ratio 0.29

Dielectric Properties

Reference for tensor and properties: Methodology

Dielectric Tensor ε_ij^∞ (electronic contribution)
2.71	0.00	-0.00
0.00	2.71	-0.00
-0.00	-0.00	2.71

Dielectric Tensor ε_ij (total)
5.69	0.00	-0.00
0.00	5.69	-0.00
-0.00	-0.00	5.69

Polycrystalline dielectric constant ε_poly^∞
(electronic contribution)

2.71

Polycrystalline dielectric constant ε_poly
(total)

5.69

Refractive Index n

1.65

Potentially ferroelectric?

Unknown

Equations of State

Reference:

Equation	E₀ (eV)	V₀ (Å³)	B	C
mie_gruneisen	-2.759	52.627	0.524	7.700
pack_evans_james	-2.759	52.631	0.058	3.904
vinet	-2.759	52.586	0.536	5.988
tait	-2.759	52.588	0.059	6.066
birch_euler	-2.759	52.616	0.066	0.927
pourier_tarantola	-2.760	52.573	0.010	2.946
birch_lagrange	-2.761	52.625	0.039	6.461
murnaghan	-2.758	52.694	0.056	3.748

Equations reference

Similar Structures

Explanation of dissimilarity measure: Documentation.

material	E_hull	# of elements
Sr₄SO₃ (mp-1079788)	0.200	3
BaSr₃O₄ (mp-984729)	0.044	3
ScH₄Pd₃ (mp-981386)	0.039	3
Sr₃CdO₄ (mp-981103)	0.019	3
SrCa₃O₄ (mp-978844)	0.040	3
YP (mp-994)	0.000	2
YSe (mp-2637)	0.000	2
TaC (mp-1086)	0.000	2
SmSe (mp-1447)	0.000	2
NbO (mp-2692)	0.787	2
Sc (mp-1008681)	0.719	1
Ca (mp-10683)	0.393	1
C (mp-998866)	2.763	1
Sb (mp-133)	0.051	1
Na (mp-1093989)	1.074	1

Up to 5 similar elemental, binary, ternary, quaternary, etc. structures displayed (dissimilarity threshold 0.75). E_hull: energy above hull per atom [eV].

Calculation Summary

Elasticity

Methodology

Structure Optimization

Run Type GGA	Energy Cutoff 520 eV
# of K-points None	U Values --
Pseudopotentials VASP PAW: Rb_sv I	Final Energy/Atom -2.7586 eV
Corrected Energy -5.5172 eV How do we arrive at this value? -5.5172 eV = -5.5172 eV (uncorrected energy) Definitions of corrections

Detailed input parameters and outputs for all calculations

Show JSON History Show BibTex Citation Download BibTex Citation

ICSD IDs

53831
61536
22168
44287
53846

Submitted by

Materials Project

User remarks:

Rubidium iodide

Displaying lattice parameters for primitive cell; note that calculated cell volumes are typically overestimated on average by 3% (+/- 6%). Note the primitive cell may appear less symmetric than the conventional cell representation (see "Structure Type" selector below the 3d structure)

material

RbI

ID:

mp-22903

DOI:

10.17188/1199069

BibTeX Citation

Material Details

Final Magnetic Moment

Magnetic Ordering

Formation Energy / Atom

Energy Above Hull / Atom

Density

Decomposes To

Band Gap

Space Group

Hermann Mauguin

Hall

Point Group

Crystal System

Electronic Structure

Topological Classification

Subclassification

Band Structure and Density of States

Vibrational Properties

Phonon dispersion

Density of States

X-Ray Diffraction

X-Ray Absorption Spectra

Substrates

Elasticity

Stiffness Tensor Cij (GPa)

Compliance Tensor Sij (10-12Pa-1)

Shear Modulus GV

Bulk Modulus KV

Shear Modulus GR

Bulk Modulus KR

Shear Modulus GVRH

Bulk Modulus KVRH

Elastic Anisotropy

Poisson's Ratio

Dielectric Properties

Dielectric Tensor εij∞ (electronic contribution)

Dielectric Tensor εij (total)

Polycrystalline dielectric constant εpoly∞ (electronic contribution)

Polycrystalline dielectric constant εpoly (total)

Refractive Index n

Potentially ferroelectric?

Equations of State

Similar Structures

Calculation Summary

Elasticity

Structure Optimization

Run Type

Energy Cutoff

# of K-points

U Values

Pseudopotentials

Final Energy/Atom

Corrected Energy

Energy Corrections

MPRelaxSet Potcar Correction

MP Gas Correction

MP Anion Correction

MP Advanced Correction

Detailed input parameters and outputs for all calculations

JSON History

BibTex Citation

ICSD IDs

Submitted by

User remarks:

Compliance Tensor Sij (10^-12Pa^-1)

Shear Modulus G_V

Bulk Modulus K_V

Shear Modulus G_R

Bulk Modulus K_R

Shear Modulus G_VRH

Bulk Modulus K_VRH

Dielectric Tensor ε_ij^∞ (electronic contribution)

Dielectric Tensor ε_ij (total)

Polycrystalline dielectric constant ε_poly^∞
(electronic contribution)

Polycrystalline dielectric constant ε_poly
(total)